Motorola HT-1000 Service Manual page 22

PLL
PTT
Registers
RESET
RF PA
RSS
RSSI
RX DATA
SLIC
SmartRib
Softpot
Software
Squelch
SRAM
Standby Mode
TOT
TPL
TSOP
µC
VCO
VSWR
xvi
Phase-Locked Loop; a circuit in which an oscillator is kept in phase with a
reference, usually after passing through a frequency divider.
Push-To-Talk; the switch located on the left side of the radio which, when
pressed, causes the radio to transmit.
Short-term data-storage circuits within the microcontrol unit or programmable
logic IC.
Reset line; an input to the microcontroller that restarts execution.
Radio Frequency Power Amplifier.
Radio Service Software.
Received signal strength indicator; a dc voltage proportional to the received rf
signal strength.
Recovered digital data line.
Support-Logic IC; a custom gate array used to provide I/O and memory
expansion for the microcontroller.
Use in conjunction with the RSS to read the Flashcode and Model Number, and
to flash upgrade radios.
Software potentiometer; a computer-adjustable electronic attenuator.
Computer programs, procedures, rules, documentation, and data pertaining to
the operation of a system.
Muting of audio circuits when received signal levels fall below a pre-determined
value.
Static-RAM chip used for volatile, program/data memory.
An operating mode whereby the radio is muted but still continues to monitor
data.
Time-Out Timer; a timer that limits the length of a transmission.
Tone Private-Line; Continuous Tone Coded Squelch System (CTCSS), industry
standard.
Thin Small-Outline Package.
Microcontrol unit (see MCU).
Voltage-Controlled Oscillator; an oscillator whereby the frequency of oscillation
can be varied by changing a control voltage.
Voltage Standing Wave Ratio.